syzkaller login: [ 60.706947] BUG: Bad rss-counter state mm:00000000f991b64b type:MM_FILEPAGES val:33 [ 60.708185] BUG: Bad rss-counter state mm:00000000f991b64b type:MM_ANONPAGES val:22 [ 60.844588] ================================================================== [ 60.845305] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.846030] Read of size 8 at addr ffff88800c975968 by task sshd/221 [ 60.846635] [ 60.846807] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.847474] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.848235] Call Trace: [ 60.848553] [ 60.848791] dump_stack_lvl+0x91/0xf0 [ 60.849201] print_report+0xcc/0x620 [ 60.849590] ? __virt_addr_valid+0x102/0x340 [ 60.850033] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.850574] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.851076] kasan_report+0xbe/0xf0 [ 60.851457] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.851956] vma_interval_tree_remove+0xc75/0xec0 [ 60.852446] vma_prepare+0xc54/0x11a0 [ 60.852827] __split_vma+0x5af/0x950 [ 60.853214] ? __pfx___split_vma+0x10/0x10 [ 60.853650] ? find_held_lock+0x2c/0x110 [ 60.854081] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.854556] ? lock_is_held_type+0x9f/0x120 [ 60.855001] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.855482] ? mtree_range_walk+0x632/0x900 [ 60.855918] ? mas_walk+0x5c7/0x7c0 [ 60.856284] do_vmi_munmap+0x1f1/0x2b0 [ 60.856661] mmap_region+0x1f9/0x2660 [ 60.857028] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.857436] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.858022] ? __pfx_lock_acquire+0x10/0x10 [ 60.858463] ? __pfx_mmap_region+0x10/0x10 [ 60.858901] ? security_mmap_addr+0x7d/0xa0 [ 60.859336] ? get_unmapped_area+0x1f5/0x3f0 [ 60.859794] do_mmap+0x854/0xf00 [ 60.860153] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.860535] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.860962] ksys_mmap_pgoff+0x3af/0x500 [ 60.861358] do_syscall_64+0x3f/0x90 [ 60.861720] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.862223] RIP: 0033:0x7fe59afd6d82 [ 60.862585] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 60.864291] RSP: 002b:00007ffc6f5ad038 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.865022] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe59afd6d82 [ 60.865716] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe59a410000 [ 60.866392] RBP: 00007fe59a410000 R08: 0000000000000009 R09: 0000000000001000 [ 60.867052] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a63dba0b20 [ 60.867713] R13: 00007ffc6f5ad050 R14: 00007ffc6f5ad080 R15: 00007ffc6f5ad3e0 [ 60.868380] [ 60.868604] [ 60.868774] Allocated by task 214: [ 60.869109] kasan_save_stack+0x22/0x50 [ 60.869504] kasan_set_track+0x25/0x30 [ 60.869892] __kasan_slab_alloc+0x59/0x70 [ 60.870301] kmem_cache_alloc+0x16b/0x370 [ 60.870714] vm_area_dup+0x20/0x160 [ 60.871071] __split_vma+0x170/0x950 [ 60.871433] split_vma+0xc6/0x110 [ 60.871783] mprotect_fixup+0x8d2/0xb30 [ 60.872170] do_mprotect_pkey+0x87e/0xd40 [ 60.872572] __x64_sys_mprotect+0x78/0xc0 [ 60.872976] do_syscall_64+0x3f/0x90 [ 60.873341] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.873842] [ 60.874007] Freed by task 214: [ 60.874335] kasan_save_stack+0x22/0x50 [ 60.874736] kasan_set_track+0x25/0x30 [ 60.875114] kasan_save_free_info+0x2b/0x50 [ 60.875526] __kasan_slab_free+0x10a/0x190 [ 60.875941] kmem_cache_free+0x10d/0x4d0 [ 60.876331] rcu_core+0x8c8/0x2860 [ 60.876670] __do_softirq+0x1b7/0x7d4 [ 60.877041] [ 60.877207] Last potentially related work creation: [ 60.877659] kasan_save_stack+0x22/0x50 [ 60.878048] __kasan_record_aux_stack+0x8e/0xa0 [ 60.878496] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.878991] remove_vma+0x139/0x170 [ 60.879339] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.879762] do_vmi_munmap+0x1f1/0x2b0 [ 60.880133] __vm_munmap+0x138/0x3a0 [ 60.880490] __x64_sys_munmap+0x59/0x80 [ 60.880875] do_syscall_64+0x3f/0x90 [ 60.881238] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.881733] [ 60.881898] The buggy address belongs to the object at ffff88800c975910 [ 60.881898] which belongs to the cache vm_area_struct of size 168 [ 60.883052] The buggy address is located 88 bytes inside of [ 60.883052] freed 168-byte region [ffff88800c975910, ffff88800c9759b8) [ 60.884145] [ 60.884311] The buggy address belongs to the physical page: [ 60.884832] page:00000000c12cc8be refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc975 [ 60.885681] memcg:ffff8880099c6201 [ 60.886011] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.886523] page_type: 0xffffffff() [ 60.886873] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 60.887587] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880099c6201 [ 60.888291] page dumped because: kasan: bad access detected [ 60.888802] [ 60.888967] Memory state around the buggy address: [ 60.889418] ffff88800c975800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 60.890082] ffff88800c975880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 60.890768] >ffff88800c975900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.891428] ^ [ 60.892031] ffff88800c975980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 60.892701] ffff88800c975a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.893354] ================================================================== [ 60.894097] Disabling lock debugging due to kernel taint [ 63.558895] BUG: Bad rss-counter state mm:000000009658774c type:MM_FILEPAGES val:33 [ 63.559618] BUG: Bad rss-counter state mm:000000009658774c type:MM_ANONPAGES val:22 [ 64.008886] BUG: Bad rss-counter state mm:00000000dcfc5a76 type:MM_FILEPAGES val:33 [ 64.009620] BUG: Bad rss-counter state mm:00000000dcfc5a76 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47893' (ECDSA) to the list of known hosts. 2023/06/20 13:10:15 fuzzer started 2023/06/20 13:10:15 dialing manager at localhost:36067 2023/06/20 13:10:15 checking machine... 2023/06/20 13:10:15 checking revisions... [ 64.658599] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:10:16 testing simple program... [ 64.703409] cgroup: Unknown subsys name 'net' [ 64.742811] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:10:15 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff8880146df458 RCX=0000000000000001 RDX=ffff8880146df3c8 RSI=ffff8880146df390 RDI=ffff8880146df3d0 RBP=dffffc0000000000 RSP=ffff8880146df350 R8 =0000000000000001 R9 =ffff8880146df400 R10=0000000000038001 R11=0000000000006097 R12=ffffed10028dbe7a R13=ffff8880146df408 R14=ffff8880146df390 R15=ffff8880146df3c0 RIP=ffffffff81130933 RFL=00000282 [--S----] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f4e86a8a900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f4e85e8d460 CR3=000000000ddd8000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=c8129dd635c047fd00000000000ae988 XMM05=5224061fa5975ae100000000001324c0 XMM06=d38b8a3d33e5168d0000000000131568 XMM07=fb795ef6d657705600000000001217a8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff88800f4b1b40 RSI=ffffffff83682793 RDI=ffff888019a63780 RBP=ffff888019a63780 RSP=ffff888009b4f998 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00030009ff02000a R12=ffffffff83867afd R13=ffff888019373980 R14=ffff888009b4fa88 R15=00000000000000a4 RIP=ffffffff836745f4 RFL=00000293 [--S-A-C] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f732a7ef900 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f732ada6618 CR3=00000000168ca000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000